diff --git a/ephemera/src/core/api_cmd.rs b/ephemera/src/core/api_cmd.rs
index 2895d8a79a..a247305412 100644
--- a/ephemera/src/core/api_cmd.rs
+++ b/ephemera/src/core/api_cmd.rs
@@ -101,7 +101,7 @@ impl ApiCmdProcessor {
     }
 
     fn ephemera_config<A: Application>(
-        ephemera: &mut Ephemera<A>,
+        ephemera: &Ephemera<A>,
         reply: Sender<api::Result<ApiEphemeraConfig>>,
     ) {
         let node_info = ephemera.node_info.clone();
diff --git a/ephemera/src/core/builder.rs b/ephemera/src/core/builder.rs
index 0c89f9ecfd..31d466420e 100644
--- a/ephemera/src/core/builder.rs
+++ b/ephemera/src/core/builder.rs
@@ -191,10 +191,10 @@ impl<A: Application> EphemeraStarterWithApplication<A> {
 
         let block_manager = self.init_block_manager(&mut storage)?;
 
-        let (mut shutdown_manager, shutdown_handle) = ShutdownManager::init();
+        let (shutdown_manager, shutdown_handle) = ShutdownManager::init();
 
         let mut service_data = ServiceInfo::default();
-        let services = self.init_services(&mut service_data, &mut shutdown_manager, provider)?;
+        let services = self.init_services(&mut service_data, &shutdown_manager, provider)?;
 
         Ok(EphemeraStarterWithProvider {
             with_application: self,
@@ -237,7 +237,7 @@ impl<A: Application> EphemeraStarterWithApplication<A> {
     >(
         &mut self,
         service_data: &mut ServiceInfo,
-        shutdown_manager: &mut ShutdownManager,
+        shutdown_manager: &ShutdownManager,
         provider: P,
     ) -> anyhow::Result<Vec<BoxFuture<'static, anyhow::Result<()>>>> {
         let services = vec![